Actually, I would say NOT.
If anything goes wrong with the research project, and a health issue came up somewhere down the road, guess who gets sued?? So unless this is not something that could become detrimental to their health in some way or other, definitely not. Lining up a "class" of people because they are "handy" is rarely a good idea.
Now if you put an advertisement in the paper, and someone who is incarcerated volunteered for the spot, there would be far less likelyhood that this would come back to haunt the researcher. But dipping into a pool that in the eyes of the law, are "in the temporary care of the state" puts the state/feds squarely in the line of fire if something unexpected comes along from the consequences of the trial.